B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/52
B29D 99/00 (2010.01) B26D 3/08 (2006.01) B26F 3/08 (2006.01)
Patent
CA 1161611
ABSTRACT OF THE DISCLOSURE A process and apparatus is described for the production of caps or so-called overcaps particularly for wine bottles, of the type having a tear strip for separating an end portion of the cap from the skirt. In accordance with the invention, caps are first injection molded, and are then passed to a multi-spindle machine which receives the caps on rotatable spindles, and which successively pierces the end of each cap to form perforations, prints the skirt portion of the cap, and then cuts the tear strip in the cylindrical wall of the cap. The tear strip is cut by a special knife having cutting edges which are spaced apart by an amount equivalent to the tear strip width, the cutting edges having a part circular sickle shape so as to contact the cylindrical wall of a cap and to form parallel lines of weakness therein while the cap moves between two stations of the rotary head machine. The major portions of the cutting edges are serrated, hut adjacent ends of the knife edges have a connecting portion which is unserrated and is arranged to cut through the cylindrical walls to form an outer end of the tear strip.
399618
Leblond Charles
Leblond Henri
Hamelin Inc.
Osler Hoskin & Harcourt Llp
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